Re: Native code FUD

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Re: Native code FUD
by Tim Jansen on Monday 09/Aug/2004, @00:38

"All Objective-C instances are allocated on the heap."

BTW this is not strictly necessary in Objective-C, and neither in Java or C#. They could use stack-allocation for many short-lived objects. It would require more/better analysis of the code though, to determine for which objects it is possible.

(Similarly all the other performance problems listed by Matthias can be solved by more intelligent compilers - we're just not there yet)

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Re: Native code FUD
by Richard Dale on Monday 09/Aug/2004, @00:50

"BTW this is not strictly necessary in Objective-C,"

It isn't possible in Objective-C - you create an instance by messaging a class object, and then sending an initialization message to the new instance. Only string literals of the form @"mystring" can be statically allocated

Instances are allocated in 'autorelease pools'. You can create you're own autorelease pools, and you would do that if you have a lot of short lived objects.

C# already allows to allocate short lived objects on the stack.

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Re: Native code FUD
by Rayiner Hashem on Monday 09/Aug/2004, @08:09

Lot's of compilers are already at that point. Stalin, CMUCL, d2c, Bigoo, etc, all do these sorts of optimizations. It's just something that hasn't come to C# and Java compilers yet (and will never come to C/C++ compilers, because of their semantics).

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